The only 2 companies I'd consider for laptops are thinkpad (lenovo) and apple. Even if you run windows on the apple. I say that as someone who's had a ton of laptops, The ones that survive are from apple and ibm/lenovo.
selectable 1,2,3,4
That's the amp I've been talking about. balanced m3 with a mega power supply. So mega it melted the power supply caps, so that's being fixed now
I'd be willing to bet that the beta22 could do a good job of driving the k340s as well. It's all about the ability to deliver current. But I am just guessing, as I've never been in the same room with a pair of 340s that I'm aware of. But my M3 is capable of delivering 7 watts or so into 8 ohms, so I would be shocked if it couldn't drive the akgs. Gain is only part of the equation.